Automatic temperature or pressure control



p 1932-: A. J. MANSURE 1,876,822

AUTOMATIC TEMPERATURE OR PRESSURE CONTROL Filed Nov. 25. 1929 mvENToR RM iQT/ME (TM/www- BY Z1 W W 443M ATTORNEYS Patented Sept; 13,' 1932 PA ET OFFICE ARTHUR J. MANSUBE OF DETROIT, MIOEIGAN AUTOMATIC TEMPERATURE B;PRESSURE CONTROL Application filed November 23, 1929. Serial No.409,348.

This invention relates to control devices and has particular referenceto a device for Controlling the flow of a fluid or the like through aconduit. One of the objects of this invention isto provide a primary andsecondary controls for regulating the flow of. a fluid through a supplyconduit together with I through a conduit,'temperature or pressure meansfor bringing the secondary control into operation only upon unusualchanges in the demand for the fluid at the point of use.

A further object of this invention is to ipro vide a valve forcontrolling the flow of uid responsive means for actuating said valve,and auxiliarymeans for modifying the effective actuation of said valveat any given temperature or pressur Other objects and advantages of.this invention together with the numerous novel details of constructionwill become more ap parent as, the following description proceeds,particularly when reference is had .to the accompanying drawing, whereinFigure 1 is a semi-diagrammatic view of a control system constructed inaccordance with the teachings of this invention, and

- Figure 2 is a fragmentary sectional view taken substantially on theline of Figure 1.

Referring then particularly to the drawing wherein like referencecharacters designate corresponding parts throughout all views, forsupplying as the chamber a fluid to a point of use such 11. While thefluid supplied through the conduit 10 may be a heating, cooling orpressure controlling fluid, the inven-,

tion will be described in connection with a system in which the pipe 10supplies a heating medium to the chamber 11. I

Arranged within the pipe 10 is a balanced valve 12 which includes. thevalve seats 13 and the valve members 14. A stem 15 is rotatablyconnected to the valve members as at 16 and extends upwardly through ahearing 17 formed in a supporting bracket 18 which carries at its upperend a diaphragm 19 closing one side of a chamber 20. Engaging the lowerface of the diaphragm is a plate 21 provided with the depending stem 22the numeral 10 designates a conduit threaded as at 23 for threadedengagement with a sleeve 24. The sleeve 24 is adapted to .belockedagainst rotation relative to the stem 22 bya set screw 25 and isprovided with a threaded opening 26 for receiving the threaded upper endof the valve stem 17 i spring 27 beats at its one end against the collar24 and at its other end against a collar 28 carried by the bracketlS fornormally urging the valve stem and valve members to 50' open position.Obviously movement of the d1aphragm'l9 incident to a variation ofpressure in the chamber 20 effects a movement or actuation of the valvemembers against the vides means for-adjusting the effective move- -mentof the valve members upon any given movement of the diaphragm for apurpose hereinafter to be more fully described," it being obvious thatrotation of the valve stem adjusts the valve members relative to theirseats and thus adjusts the opening or closingofthe valve by thediaphragm. 4

Air under pressure is supplied to the chamber 20 by apipe 35 whichcommunicates at its oneend with a suitable source of air under pressure,(not shown) and at its other end'with a bore 36 extending transverselyof a body or casting 37. The opposite end of this bore communicates witha conduit 38 so which in turn communicates with the chamber 20 by meansof a conduit 39.

For regulating the pressure of air in the chamber 20 .there is provideda valve body 40 threaded in a bore 41 formed in the body 37 andextending transversely of the bore 36. This valve body has thetransversely exwhich is constantly main tending bore 42 with the bore 36passage and the chamber 45. 7

While the valve 47 is'shown as seatmgon 109 means of. an annular recess43 and is ac,

the lower end of the bore or passage 44, it is the reference character50 obvious that the same may be arranged to seat on the upper end of thepassage 46, the valve in one case being a direct acting valve and in theother case a reverse acting valve. The valve body 40, may be threadedlyadjusted longitudinally of the bore 41 to vary the position of the portstherein relative to the valve 47 and suitable indi-.

cating mechanism, designated generally by may be provided for indicatingthe position of the valve body. Further, orifice plates 52 and 53 may bemounted in the bore 36, the restricted orifice in the plate 52 renderingthe valve 47 more sensitive to operation, and the restricted orifice inplate 53 acting to slow up the changes in pressure in the chamber 20.

For actuating the valve 47 a suitable thermostat or pressure responsivemember (not shown) is mounted in the chamber 11 and this member isconnected by a tube with a diaphragm chamber 61 having the flexible top62. This diaphragm chamber is carried by a bracket 63 secured to thebody 37 and is thus arranged below the valve 47. The top 62 of thisdiaphragm chamber is arranged in abutting engagement with a spring 64and the opposite end of this spring abuttingly engages a cam 65 mountedon a shaft 66. Brackets 67 carried by this shaft engage a spring plate68 pivoted at its one end as at 69 in the body 37. A second plate 70 ispivoted to the opposite side of the body 37 and engages the stem 71 ofthe valve 47. The plates 68 and 70 are arranged in spaced relation toeach other and a roller or the like 72 arranged between these platesprovides means for moving the one from the other.

The arrangement is such that movement of the top wall 62 of thediaphragm chamber effects a movement of the valve 47 to regulate theexhaust of air from the bore 36. The cam 65 may be adjusted by asuitable handle 73 mounted on the shaft 66 and the roller 72 may beadjusted relative to the pivot points of the plates 68 and 70 by meansof a threaded shaft 74 engaging this roller, to thus regulate theeffective movement of the valve 47 upon any predetermined movement ofthe top 62 of the diaphragm chamber.

As thus far described the operation of the device is as follows. A setair pressure within predetermined limits is maintained within thechamber 20'by proper adjustment of the cam 65 and roller 72 to hold thevalve 12 at its best working position and to permit the flow ofsufficient heating, cooling or pressure fluid to the chamber to maintainthe desired conditions within this chamber. Obviously if the temperaturewithin the chamber 11 increases the valve 47 Will be moved toward closedposition thus permitting pressure to build up in the chamber 20 topartially close the valve 12. If on the other hand the temperaturewithin the chamber 11 decreases beyond the desired temperature the valve47 will be moved to ward open position to permit more air to exhaustfrom the bore 36 and the chamber 20 and to permit the spring 27 to movethe valve 12 toward open position. Thus the mechanism as thus fardescribed will function to maintain the temperature within the chamber11 at any predetermineddesired degree.

During the normal operation of the device the valve 12 will move butslightly, the arrangement being such that a substantially constantpressure will be maintained within the chamber 20 to hold the valve 12at its best working position. If, however, the demand for the fluidsupplied by pipe 10 is increased or decreased beyond certain limits,difficulties are encountered in that the valve 12 will either beincapable of permitting sufficient fluid to pass to the chamber 11 orwill be moved so far from its best working position as to functioninefficiently to control the supply of fluid through the conduit 10.Accordingly the present invention contemplates in particular theprovision of auxiliary means operable to act on the adjustableconnection between the valve stem 15 and the diaphragm 20 to vary theeffective actuation of the valve 12 by the diaphragm 20 upon apredetermined change in the demand for the fluid.

To accomplish this result there is provided a diaphragm chambercommunicating with the conduit 38 for receiving air under pressuretherefrom. This chamber is supported by a bracket 81 and is providedwith a stem 82 connected to a lever 83 pivoted as at 84 on the bracket.A spring 85 acts on one end of the lever 83 to balance the pressurewithin the diaphragm chamber to the normal pressure within the chamber20 and conduit 38.

The opposite end of the lever 83 is arranged between the ports 86 and 87formed on the ends of conduits 88 and 89 respectively. The ports 86 and87 are adjustable relative to the end of the lever 83, this adjustmentbeing provided in any desired manner, so that one or the other of theseports will be closed upon a predetermini'ng movement of the lever aboutits pivot. Air under pressure is supplied to the conduits 88 and 89 by asuitable air supply pipe 90 having the branches 91 and 92 communicatingwith the said conduits.

The conduits 88 and 89 are extended downwardly and communicate with theends of cylinders 94 and 93 respectively. These cylinders are carried bythe sides of the bracket 18 and are thus positioned on opposite sides ofthe valve stem 17. I

Arranged in the cylinder 93 is a piston 95 air supplied through the Asprlng 97 surrounds this piston rod and urges the piston rearwardlyagainst the pressure of the to the same by the conduit 89.

As clearly illustrated in Figure 2 of the drawing, a collar 98 is fixedto the valve stem 17 and this collar is provided with an annular seriesof ratchet teeth 99 adapted for engagement by a pawl 100 carried by theend of the piston rod 96. Thus upon reciprocation of the piston 95, thepawl 100 will en gage the ratchet to impart a step-by-step rohaving arod 96 which projects tative movement to the collar 98 and stem 17 tothreadedly adjust the stem 17 within the The conduit 89 isprovided witha by-pass 101 which terminatesin an exhaust valve.

102 which may be of an desired construction and which is connecte to thepiston rod 96 by a link 103. The arrangement is such that when the pston 93 is moved forwardly by the pressure of the air in the conduit 89the link 103 is moved by the rod '96 to actuate the valve 102 to permitthe air to exhaust through the by-pass from the conduit 89. This reducesthe pressure in back of the piston 93 and permits the s ring 97 toreturn the piston to its rearwar position at Which time the link 103functions to close the valve 102 thus permitting a pressure to againbuild up between the piston and the end of the cylinder. Thus when airunder pressure is supteeth 99 so that upon also carried by the collar98.

plied to the cylinder throughthe conduit 89 the piston in the cylinderwill be reciprocated to efi'ectan-actuation of the collar 98.

The cylinder 94 is provided with a similar piston rod and pawl forengagement with a second annular series ofratchet teeth 99' This seriesof ratchetteeth are inclined oppositely to the in the cylinder 94 thestem 17 is'rotatably adjusted inthe opposite direction.

.Air is constantly su plied tothe conduits 88 and 89 by the supp y pipe90 and during the normal operation of the device, this air is exhaustedthrough the ports 87 and 88. Upon a predetermined movement of the lever83, however, one of the ports 87 or 88 is closed whereby pressure isbuilt up in one of the conduits to effect an actuation of the iston inone-of the cylinders. Thus if the ever moves to close the port 87,pressure is built up in the conduit 89 and the piston 95 in cylinder 93is actuated to effect aclockwise rotation of the valve stem 17 and thusmove'the valve toward closed position. If on the other hand the piston95 in cylinder 94 is actuated'to rotate thevalve stem in the oppositedirection and move the valve toward open position.

From the above is believed that the operation of the invention will beclearly apparent. The cam and roller 72 are inithe demand for the. fluidsupp actuation of the pistonagain adjust port 86'is closed, the

'12 may be maintained atits best tiall set to maintain a predetermineddesire pressure in the chamber 20'to hold the valve 12 in a position tomaintain the desired temperature in the chamber 11. Upon slightvariations in the temperature within the chamber 11 the valve 47 will beactuated to increase or decrease the pressure within the chamber 20 andto thus actuate the valve 12 to vary the flow of fluid to the chamber11. Thus the valve 12 may be set at its best working position tomaintain a substantially constant how of fluid through the conduit 10 tomaintain the chamber 11 at the desired temperature.

If, however, there is a decided change in lied'by the pipe 10asfor'example, if this pipe is supplying a heating medium to a volumeofwater in the chamber 11 and this volume of water-is substantiallyincreased, then the auxiliary mechanism functions of the valve 12 totake care of this increased demand. Thus if the temperature within thechamber 11 drops owing to the increased volume of water, the valve. 47will be opened and the pressure within chamber 20 will be decreased topermit open. If this complete opening of the valve 12 is not suflicientto supply the increased demand, the pressure within. chamber 20 willcontinue to dropas will also the presto increase the opening the valve12 to fully sure within diaphragm chamber 80 and within a predetermineddrop in diaphragm chamber 80, the spring; 85 will move the lever ,83about its pivot to close port 86. The closing of port 86 will permit, abuilding up of pressure in conduit 88 which will actuate the pistoniii-cylinder 94 and effect a rota-' tion of the valve stem 17 to thusadjust the connection between valve stem 17 and dia- .phragm 19. Thevalve stem will be rotated I to shorten the connection between the dia-'ment of this valve the pressure within the chamber 20 will return tothe predetermined se't pressure.

The mechanism will function in this man- .181 until a furthersubstantial change in the occurs in which event demand for the fluidwill function to the auxiliary mechanism the connection between valve 12and diaphragm 19 to modify the action of v this valve to take care ofthe changed demand. v Thus it will be apparent that the invent onrovides means for controlling the actuation valve operable upon apredetermined change in the demand for the fluid. Thus the valve workingof valve 12between predetermined limits to-' 4 amaze range and thepressure within the chamber 20 set to maintain a constant temperature orpressure within the chamber 11.

While the mechanism for actuating the ad justing mechanism for the valvehas been described as air operated, it will be readily understood thatthe mechanism ma be operated by any fluid under pressure or y any othermeans controlled by a predetermined change in the pressure in diaphragmchamber 20. It will be further understood that the description is forthe purposes of illustration only and is not definitive of the limits ofthe in ventive idea, the right being reserved to make such changes inthe details of construction and arrangementof parts as will fall withinthe purview of the attached claims.

What I claim as my invention is:

1. In combination, a fluid supply conduit, a valve for controlling theflow of fluid through said conduit, a member movable upon variations inthe demand for the fluid, a connection between said member and saidvalve for, actuating the latter'from the former, and means for adjustingsaid connection to vary the effective actuation of the valve by saidmember upon a predetermined change in the demand for said fluid.

2. In combination, a fluid supply conduit, a valve for controlling theflow of fluid through said conduit, a diaphragm, means controlled by thedemand for the fluid for actuating said diaphragm, a connection betweensaid diaphragm and valve for actuating the latter upon movement of theformer and means for adjusting the length of said connection upon apredetermined change in the demand for the fluid.

3. In combination, a fluid supply conduit, a valve for controlling theflow of fluid through said conduit, a diaphragm, a pressure chamber towhich said diaphragm is exposed, means controlled by the demand for thefluid for varying the pressure in said chamber, a connection betweensaid diaphragm and said valve for actuating the latter upon movement ofthe former and means operable upon a predetermined change in the demandfor the fluid to adjust the length of said connection to regulate theactuation of said valve at any given pressure in said chamher.

4. In combination, a chamber, a conduit for supplying a heat exchangefluid to said chamber, a valve in said conduit, a diaphragm,thermostatic means controlled by the temperature in said chamber foractuat ing said diaphragm, a connection between said diaphragm and saidvalve for actuating the latter upon movement of the former, and meansoperable upon a predetermined change in the temperature in said chamberfor modifying the effective actuation of said valve by said diaphragm.

5. In combination, a valve for controlling the flow of a heat exchangefluid to a chamher, a diphragm, an adjustable connection between saiddiaphragm and valve for actuating the latter from the former, meanscontrolled by the temperature in said chamber for actuating thediaphragm, and means operable upon a predetermined change in thetemperature in said chamber to adjust said connection to vary theeffective actuation of said valve by said diaphragm.

6. In combination, a valve for controlling the flow of a heat exchangefluid to a chamber, a diaphragm, an adjustable connection between saiddiaphragm and valve for actuating the latter from the former, meanscontrolled by the temperature in said chamber for actuating thediaphragm, and means 0perable upon a predetermined change in thetemperature in said chamber to adjust said connection to vary theeffective actuation of said valve by said diaphragm, said last mentionedmeans including rachets for adjusting said connection, pawls foractuating said ratchets, a diaphragm chamber, and means operable upon apredetermined movement of said diaphragm chamber to actuate one or theother of said pawls.

7. In combination, a fluid supply conduit, a valve in the conduit, astem for said valve, a diaphragm, a sleeve fixed to said diaphragm andthreadedly engaging said stem, means controlled by the demand for thefluid for actuating said diaphragm, and means operable upon apredetermined change in the demand for the fluid to rotate said stem tothreadedly adjust the same in said sleeve.

8. In combination, a fluid supply conduit, a valve in the conduit, astem for said valve, a diaphragm, a sleeve fixed to said diaphragm andthreadedly engaging said stem, means controlled by the demand for thefluid for actuating said diaphragm, and means operable upon apredetermined change in the demand for the fluid to rotate said stem tothreadedly adjust the same in said sleeve, said means including a collarfixed to said stem, ratchets carried by said collar, and pawlsengageable with said ratchets for rotating said collar.

9. In combination, a valve for controlling the flow of a heat exchangemedium to a chamher, a pressure actuated member, a connection betweensaid pressure actuated member and said valve for actuating the latterfrom the former, means for controlling the pressure acting on saidpressure actuated member in dependence upon the demand for the fluid,and means for adjusting the length of the connection between saidpressure actuated member and said valve upon a predetermined change inthe pressure acting on said pressure actuated member.

10. In combination. a valve for controlling the flow of a heat exchangefluid to a chamher, a diaphragm connected to said valve for tuation ofsaid valve a chamber in which said actuating the same,

d, means for varymg diaphragm is mounte the pressure in and collapsiblemember communicating with said diaphragm chamber, only upon apredetermined movement of expansible and contractable ify the actuationof said valve by hragm. 11. In combination, the flow of a heatexchange.her, a pressure responsive ing said valve, means for controlling thepressure acting on said pressure responsive desaid diafluid to achamvice in dependence upon the demand for the.

fluid, a second pressure responsive device exposed to hepressure actingon said mentioned pressure responsive device, and means operable onlyupon a predetermined actuation of said second mentioned pressureresponsive device tomodify the-eflective acpressure responsive device.

In testimony w ereof I aflix my signature.

ARTHUR J. MANSURE.

Lil

said chamber in dependence upon the demand for the fluid, an expansibleand means operable said member to moda valve for controlling device foractuate first by said first mentioned

